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BOOK MARK. No. 332,327. Patented Dec. 15 1885.

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UNITED STATES PATENT OFFICE.

WILLIAM F. CLARK, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE- HALF TO FREDERIC M. DICKERHOFF, OF SAME PLACE.

BOOK-MARK.

SPECIFICATION forming part of Letters Patent No. 332,327, dated December 15, 1885.

' Application filed September 11, 1884. Serial No. 142,834. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM F. CLARK, a citizen of the United States, residing in the city and county of San Francisco, State of California, have made and invented an Improved Book-Mark; and I do hereby declare that the following is a full, clear, and exact description of the said invention, reference being had to the accompanying drawings.

My invention relates to a device for marking or indicating any part, paragraph, or line on the page of a book for ready reference, whereby the book may be closed and at any time opened to the particular place to be referred to without loss of time.

This improved device of the kind consists of a small metal strip or plate rectangular in shape, with a tongue or part to form a pointer produced from the metal in the center by cutting through on three sides, so as to detach a tongue portion in the direction of the greater length of the plate, but leaving this part connected to the plate at one end. The edge of a leaf or sheet of paper being inserted behind the point of this tongue or separated portion, the surrounding rim or margin of the plate is brought on one side of the paper and the tongue on the other. Sufficient amount of spring or resistance to this separation of the two parts being afforded by the quality of metal used, the edge of the leaf is clamped and held with the force required to keep the device from slipping along the edge of the paper. In connection with such index or pointer there is also provided a means of attaching to the outer edge of this marker a memorandum slip or piece of paper, to enable one marker to be distinguished from another where several are used together on the same or adjacent pages.

In producing this device I proceed as follows, the accompanying drawings being referred to by figures and letters, in which- Figure 1 is a face View of a book with my device attached. Fig. 2 is a face View of the device detached. Fig. 3 is an edge view of the same.

From a thin metal blank, A, of rectangular shape-its length in excess of its width- I form a marker of this character by cutting or stamping out of the central portion of the plate a pointed tongue, a, preferably narrow or running to a point at the detached end a, and at the other end or base somewhat broader, so that at this part the metal joining the tongue to the surrounding rim or margin is of considerable breadth. The ends of this slit or out A also terminate at a point back of the edge of the plate, thus leaving more metal at the ends or shorter sides than along the top and bottom sides of the surrounding rim, and leaving also sufficient metal beyond the points A to give a projecting end, A, to the marker beyond the edge of the leaf when the book is closed.

At the part where the tongue and plate portion join the metal is slightly bent or set up on a line extending across from one end, A, of the slit to the other, A so as to throw out the tongue at the base, and thereby allow the edge of the paper to set in close to the termination of the slit, and the tongue to lie flat upon the paper. In this manner I produce a very simple, inexpensive, and convenient article or device for the purpose, as it is readily produced from a single strip or piece of metal without requiring any special skillin its manufacture.

To afford a means of attaching a memorandum-slip, as M, to the marker, I cut out of the metal at the outer end of the plate a small tongue, d, so that it will clamp and hold the edge of a slip of paper, and thus connect the marker with any notes or memoranda to be referred to at the same time with the marked paragraph in the book.

The device is readily removed and attached, it does not mark or deface the page, and, in addition to its simplicity and its property of holding its position wherever placed, it is capable of being manufactured at exceedingly low cost.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination of the tongue a, and

In witness whereof I have hereunto set my and and seal.

WILLIAM F. CLARK. [L s.]

Witnesses:

W. J. TRAVERS, EDWARD E. OSBORN. 

